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-rw-r--r--drivers/hid/hid-lg4ff.c110
1 files changed, 110 insertions, 0 deletions
diff --git a/drivers/hid/hid-lg4ff.c b/drivers/hid/hid-lg4ff.c
index 031b8abd7131..f7f4eb6e20e7 100644
--- a/drivers/hid/hid-lg4ff.c
+++ b/drivers/hid/hid-lg4ff.c
@@ -89,6 +89,7 @@ struct lg4ff_wheel_data {
};
struct lg4ff_device_entry {
+ spinlock_t report_lock; /* Protect output HID report */
struct lg4ff_wheel_data wdata;
};
@@ -303,9 +304,24 @@ static int lg4ff_play(struct input_dev *dev, void *data, struct ff_effect *effec
struct hid_device *hid = input_get_drvdata(dev);
struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
struct hid_report *report = list_entry(report_list->next, struct hid_report, list);
+ struct lg4ff_device_entry *entry;
+ struct lg_drv_data *drv_data;
+ unsigned long flags;
s32 *value = report->field[0]->value;
int x;
+ drv_data = hid_get_drvdata(hid);
+ if (!drv_data) {
+ hid_err(hid, "Private driver data not found!\n");
+ return -EINVAL;
+ }
+
+ entry = drv_data->device_props;
+ if (!entry) {
+ hid_err(hid, "Device properties not found!\n");
+ return -EINVAL;
+ }
+
#define CLAMP(x) do { if (x < 0) x = 0; else if (x > 0xff) x = 0xff; } while (0)
switch (effect->type) {
@@ -313,6 +329,7 @@ static int lg4ff_play(struct input_dev *dev, void *data, struct ff_effect *effec
x = effect->u.ramp.start_level + 0x80; /* 0x80 is no force */
CLAMP(x);
+ spin_lock_irqsave(&entry->report_lock, flags);
if (x == 0x80) {
/* De-activate force in slot-1*/
value[0] = 0x13;
@@ -324,6 +341,7 @@ static int lg4ff_play(struct input_dev *dev, void *data, struct ff_effect *effec
value[6] = 0x00;
hid_hw_request(hid, report, HID_REQ_SET_REPORT);
+ spin_unlock_irqrestore(&entry->report_lock, flags);
return 0;
}
@@ -336,6 +354,7 @@ static int lg4ff_play(struct input_dev *dev, void *data, struct ff_effect *effec
value[6] = 0x00;
hid_hw_request(hid, report, HID_REQ_SET_REPORT);
+ spin_unlock_irqrestore(&entry->report_lock, flags);
break;
}
return 0;
@@ -352,6 +371,7 @@ static void lg4ff_set_autocenter_default(struct input_dev *dev, u16 magnitude)
u32 expand_a, expand_b;
struct lg4ff_device_entry *entry;
struct lg_drv_data *drv_data;
+ unsigned long flags;
drv_data = hid_get_drvdata(hid);
if (!drv_data) {
@@ -366,6 +386,7 @@ static void lg4ff_set_autocenter_default(struct input_dev *dev, u16 magnitude)
}
/* De-activate Auto-Center */
+ spin_lock_irqsave(&entry->report_lock, flags);
if (magnitude == 0) {
value[0] = 0xf5;
value[1] = 0x00;
@@ -376,6 +397,7 @@ static void lg4ff_set_autocenter_default(struct input_dev *dev, u16 magnitude)
value[6] = 0x00;
hid_hw_request(hid, report, HID_REQ_SET_REPORT);
+ spin_unlock_irqrestore(&entry->report_lock, flags);
return;
}
@@ -417,6 +439,7 @@ static void lg4ff_set_autocenter_default(struct input_dev *dev, u16 magnitude)
value[6] = 0x00;
hid_hw_request(hid, report, HID_REQ_SET_REPORT);
+ spin_unlock_irqrestore(&entry->report_lock, flags);
}
/* Sends autocentering command compatible with Formula Force EX */
@@ -425,9 +448,25 @@ static void lg4ff_set_autocenter_ffex(struct input_dev *dev, u16 magnitude)
struct hid_device *hid = input_get_drvdata(dev);
struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
struct hid_report *report = list_entry(report_list->next, struct hid_report, list);
+ struct lg4ff_device_entry *entry;
+ struct lg_drv_data *drv_data;
+ unsigned long flags;
s32 *value = report->field[0]->value;
magnitude = magnitude * 90 / 65535;
+ drv_data = hid_get_drvdata(hid);
+ if (!drv_data) {
+ hid_err(hid, "Private driver data not found!\n");
+ return;
+ }
+
+ entry = drv_data->device_props;
+ if (!entry) {
+ hid_err(hid, "Device properties not found!\n");
+ return;
+ }
+
+ spin_lock_irqsave(&entry->report_lock, flags);
value[0] = 0xfe;
value[1] = 0x03;
value[2] = magnitude >> 14;
@@ -437,6 +476,7 @@ static void lg4ff_set_autocenter_ffex(struct input_dev *dev, u16 magnitude)
value[6] = 0x00;
hid_hw_request(hid, report, HID_REQ_SET_REPORT);
+ spin_unlock_irqrestore(&entry->report_lock, flags);
}
/* Sends command to set range compatible with G25/G27/Driving Force GT */
@@ -444,10 +484,26 @@ static void lg4ff_set_range_g25(struct hid_device *hid, u16 range)
{
struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
struct hid_report *report = list_entry(report_list->next, struct hid_report, list);
+ struct lg4ff_device_entry *entry;
+ struct lg_drv_data *drv_data;
+ unsigned long flags;
s32 *value = report->field[0]->value;
+ drv_data = hid_get_drvdata(hid);
+ if (!drv_data) {
+ hid_err(hid, "Private driver data not found!\n");
+ return;
+ }
+
+ entry = drv_data->device_props;
+ if (!entry) {
+ hid_err(hid, "Device properties not found!\n");
+ return;
+ }
+
dbg_hid("G25/G27/DFGT: setting range to %u\n", range);
+ spin_lock_irqsave(&entry->report_lock, flags);
value[0] = 0xf8;
value[1] = 0x81;
value[2] = range & 0x00ff;
@@ -457,6 +513,7 @@ static void lg4ff_set_range_g25(struct hid_device *hid, u16 range)
value[6] = 0x00;
hid_hw_request(hid, report, HID_REQ_SET_REPORT);
+ spin_unlock_irqrestore(&entry->report_lock, flags);
}
/* Sends commands to set range compatible with Driving Force Pro wheel */
@@ -465,11 +522,27 @@ static void lg4ff_set_range_dfp(struct hid_device *hid, u16 range)
struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
struct hid_report *report = list_entry(report_list->next, struct hid_report, list);
int start_left, start_right, full_range;
+ struct lg4ff_device_entry *entry;
+ struct lg_drv_data *drv_data;
+ unsigned long flags;
s32 *value = report->field[0]->value;
+ drv_data = hid_get_drvdata(hid);
+ if (!drv_data) {
+ hid_err(hid, "Private driver data not found!\n");
+ return;
+ }
+
+ entry = drv_data->device_props;
+ if (!entry) {
+ hid_err(hid, "Device properties not found!\n");
+ return;
+ }
+
dbg_hid("Driving Force Pro: setting range to %u\n", range);
/* Prepare "coarse" limit command */
+ spin_lock_irqsave(&entry->report_lock, flags);
value[0] = 0xf8;
value[1] = 0x00; /* Set later */
value[2] = 0x00;
@@ -498,6 +571,7 @@ static void lg4ff_set_range_dfp(struct hid_device *hid, u16 range)
if (range == 200 || range == 900) { /* Do not apply any fine limit */
hid_hw_request(hid, report, HID_REQ_SET_REPORT);
+ spin_unlock_irqrestore(&entry->report_lock, flags);
return;
}
@@ -512,6 +586,7 @@ static void lg4ff_set_range_dfp(struct hid_device *hid, u16 range)
value[6] = 0xff;
hid_hw_request(hid, report, HID_REQ_SET_REPORT);
+ spin_unlock_irqrestore(&entry->report_lock, flags);
}
static const struct lg4ff_compat_mode_switch *lg4ff_get_mode_switch_command(const u16 real_product_id, const u16 target_product_id)
@@ -575,9 +650,25 @@ static int lg4ff_switch_compatibility_mode(struct hid_device *hid, const struct
{
struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
struct hid_report *report = list_entry(report_list->next, struct hid_report, list);
+ struct lg4ff_device_entry *entry;
+ struct lg_drv_data *drv_data;
+ unsigned long flags;
s32 *value = report->field[0]->value;
u8 i;
+ drv_data = hid_get_drvdata(hid);
+ if (!drv_data) {
+ hid_err(hid, "Private driver data not found!\n");
+ return -EINVAL;
+ }
+
+ entry = drv_data->device_props;
+ if (!entry) {
+ hid_err(hid, "Device properties not found!\n");
+ return -EINVAL;
+ }
+
+ spin_lock_irqsave(&entry->report_lock, flags);
for (i = 0; i < s->cmd_count; i++) {
u8 j;
@@ -586,6 +677,7 @@ static int lg4ff_switch_compatibility_mode(struct hid_device *hid, const struct
hid_hw_request(hid, report, HID_REQ_SET_REPORT);
}
+ spin_unlock_irqrestore(&entry->report_lock, flags);
hid_hw_wait(hid);
return 0;
}
@@ -826,8 +918,24 @@ static void lg4ff_set_leds(struct hid_device *hid, u8 leds)
{
struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
struct hid_report *report = list_entry(report_list->next, struct hid_report, list);
+ struct lg_drv_data *drv_data;
+ struct lg4ff_device_entry *entry;
+ unsigned long flags;
s32 *value = report->field[0]->value;
+ drv_data = hid_get_drvdata(hid);
+ if (!drv_data) {
+ hid_err(hid, "Private driver data not found!\n");
+ return;
+ }
+
+ entry = drv_data->device_props;
+ if (!entry) {
+ hid_err(hid, "Device properties not found!\n");
+ return;
+ }
+
+ spin_lock_irqsave(&entry->report_lock, flags);
value[0] = 0xf8;
value[1] = 0x12;
value[2] = leds;
@@ -836,6 +944,7 @@ static void lg4ff_set_leds(struct hid_device *hid, u8 leds)
value[5] = 0x00;
value[6] = 0x00;
hid_hw_request(hid, report, HID_REQ_SET_REPORT);
+ spin_unlock_irqrestore(&entry->report_lock, flags);
}
static void lg4ff_led_set_brightness(struct led_classdev *led_cdev,
@@ -1015,6 +1124,7 @@ int lg4ff_init(struct hid_device *hid)
entry = kzalloc(sizeof(*entry), GFP_KERNEL);
if (!entry)
return -ENOMEM;
+ spin_lock_init(&entry->report_lock);
drv_data->device_props = entry;
/* Check if a multimode wheel has been connected and
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-20 19:00:47 +0100